5× 4\div 10+40-7

解答

5 \times 4 \div 10 + 40 - 7

35

求解步骤

5 \times 4 \div 10 + 40 - 7

遵循 PEMDAS 运算顺序

乘除（左右）

5 \times 4 \div 10 : 2

5 \times 4 \div 10

5 \times 4 = 20

= 20 \div 10

20 \div 10 = 2

= 2

= 2 + 40 - 7

加减（左右）

2 + 40 - 7 : 35

2 + 40 - 7

2 + 40 = 42

= 42 - 7

42 - 7 = 35

= 35

= 35

8 \frac{1}{5} + (3 \frac{2}{5} + 5 \frac{4}{5})

2 (\frac{1}{3} + \frac{1}{2})

23 (\frac{1}{46} - \frac{9}{15})

1 - 9^{2}

(12 - 2^{4})^{3}